Gyms & fitness in Ontario, CA
50 gyms & fitness listed in Ontario, California. 46 with a phone number and 45 with a website.
Ontario accounts for 0% of the gyms & fitness listed in California and ranks #121 among California cities for gyms & fitness.
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Quick answer
Ontario, CA has 50 gyms & fitness listed on USA Business Search. 46 list a phone number and 45 list a website. The most listings are in ZIP codes 91762, 91761, 91764.
Updated October 2026Exploring GLP-1 weight loss? Elevation Health is a dietitian-led telehealth program with clinician review. Free assessment, no obligation.Take the assessment
California All Stars-ontario
Planet Fitness
Forza1 North Volleyball
THE GYM Ontario
Crossfit Lifted
1/28 Raceway
24 Hour Fitness
Action Time Bungee Trampoline
America Unique Taekwondo
Ape Arena
Battle Lab
Blink Fitness Ontario
Blue Haven Pools & Spas
Bradford Fitness
CrossFit Kinnick
CrossFit Lifted
CrossFit OuterLimits
Crossroads Boxing
Crunch Fitness
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Custom Billiards and Games Room
David Gutierrez Fitness
El Luchador Barbell Club
Empire Hockey Club
Extreme Training Equipment
Fit Nation Gym Ontario
Gaby fitness life
Hit & Run Batting Cages
iFLY - Ontario
N8's Billiards
Ontario Boxing Club
Ontario Fit Body Boot Camp
Ontario Motor Speedway
Ontario Recreation Department
Planet Fitness
Progress Lab Ontario
Rock Climb Every Day
Savage Fit Club
SCPGA Junior Tour
Self Love Club Fitness
Sweat It Out! Fitness
The Camp Transformation Center
The Ultimate Warriors Boxing Academy
The Zumba Empire
Train With Talia Personal Training
True Athlete Training Systems, Llc
UFC GYM
Va Fit Club
West State Gamerooms
World Elite Gymnastics
How to choose a gym in Ontario
- Ask for a free trial or day pass before you sign.
- Read the cancellation terms before you join.
- Visit at the time you plan to work out to see how busy it gets.
Medical weight loss and GLP-1 care in Ontario: what to ask
- GLP-1 medicines such as semaglutide and tirzepatide are prescription-only. A licensed prescriber should review your health history and any labs.
- Ask whether the medication is an FDA-approved brand or a compounded version, and which pharmacy fills it.
- Ask for the full monthly cost in writing: visits, medication, shipping and follow-up.
- Ask how side effects are monitored and how often you will check in with a clinician or dietitian.
See the medical weight loss guide for providers by state.
Common questions
How many gyms & fitness are listed in Ontario, California?
USA Business Search shows 50 gyms & fitness in Ontario. 46 list a phone number and 45 list a website.
Which ZIP codes do these listings cover?
They include ZIP codes 91762, 91761, 91764.
How do I choose a gym in Ontario?
Ask for a free trial or day pass before you sign. Read the cancellation terms before you join.
How do gyms & fitness in Ontario compare with the rest of California?
Ontario has 0% of the 23,875 gyms & fitness listed in California, which ranks #121 among California cities for this category.
How do I add or fix a listing?
Listings are free. Use Add your business, or the Claim or fix link on any listing.
Do I need a prescription for GLP-1 weight loss in Ontario?
Yes. Semaglutide and tirzepatide are prescription medications, and a licensed provider decides whether they are appropriate for you. Telehealth programs such as Elevation Health (featured) review your intake from home.
More fitness & recreation in Ontario
Gyms & fitness nearby
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